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7. Hold garden sprayer nozzle close to finned areas and
apply cleaner with a vertical, up-and-down motion.
Avoid spraying in horizontal pattern to minimize po-
tential for fin damage.
8. Ensure cleaner thoroughly penetrates deep into finned
areas.
9. Interior and exterior finned areas must be thoroughly
cleaned.
10. Finned surfaces should remain wet with cleaning
solution for 10 minutes.
11. Ensure surfaces are not allowed to dry before rinsing.
Reapply cleaner as needed to ensure 10-minute satur-
ation is achieved.
12. Thoroughly rinse all surfaces with low velocity clean
water using downward rinsing motion of water spray
nozzle. Protect fins from damage from the spray
nozzle.
13. Replace top cover and rear corner posts.
FASTENER TORQUE VALUES
Table 13 – Torque Values
Compressor m ounting bolts 65---75 in–lbs
(734–847 N–cm)
Condenser fan motor mounting bolts 20 ±2in–lbs
(226 ±23 N–cm)
Condenser fan hub setscrew 84 ±2in–lbs
(949 ±136 N–cm)
High-flow service port 96 ±10 in–lbs
(1085 ±23 N–cm)
Schrader-type service check valve 2–3 in–lbs
(23–34 N–cm)
Compressor oil sightglass thread 330 ±31 in–lbs
(23–34 N–cm)
Compressor to Compressor rail torque 120–168 in–lbs
(1356–1898 N–cm)
Compressor rail to base pan torque 70 ±5in–lbs
(791 ±57 N–cm)
TROUBLESHOOTING
PROBLEM SOLUTION
COMPRESSOR DOES NOT RUN
Contactor Open
1. Power off. 1. Restore power.
2. Fuses blown in field power circuit. 2. After finding cause and correcting, replace with correct size fuse.
3. No control power. 3. Check control transformer primary connections and circuit breaker.
4. Thermostat circuit open. 4. Check thermostat setting.
5. Safety device lockout circuit active. 5. Reset lockout circuit.
6. Low-pressure switch open. 6. Check for refrigerant undercharge, obstruction of indoor airflow. Make
sure liquid line solenoid valve(s) is open.
7. High-pressure switch open. 7. Check for refrigerant overcharge, obstruction of outdoor airflow , air in system.
Be s ure o utdoor fans are operating correc tl y .
8. Compressor overtemperature switch open. 8. Check for open condition. Allow for reset. Replace compressor if necessary
9. Loose electrical connections. 9. Tighten all connections.
10. Compressor stuck. 10. See compressor service literature.
Contactor Closed
1. Compressor leads loose. 1. Check connections.
2. Motor windings open. 2. See compressor service literature.
3. Single phasing. 3. Check for blown fuse. Check for loose c onnection at compressor terminal.
COMPRESSOR STOPS ON HIGH-PRESSURE SWITCH
Outdoor Fan On
1. High-pressure switch faulty. 1. Replace switch.
2. Reversed fan rotation. 2. Confirm rotation, correct if necessary.
3. Airflow restricted. 3. Remove obstruction.
4. Air recirculating. 4. Clear airflow area.
5. Noncondensables in system. 5. Recover refrigerant and recharge as required.
6. Refrigerant overcharge. 6. Recover refrigerant as required.
7. Line voltage incorrect. 7. Consult power company.
8. Refrigerant system restrictions. 8. Check or replace filter drier, expansion valve, etc.
Outdoor Fan Off
1. Fan slips on shaft. 1. Tighten fan hub setscrews.
2. Motor not running. 2. Check power and capacitor.
3. Motor bearings stuck. 3. Replace bearings.
4. Motor overload open. 4. Check overload rating. Check for fan blade obstruction.
5. Motor burned out. 5. Replace motor.
38AU